Telephone metering system.



E. H'. MARTIN. TELEPHONE METERING. SYSTEM.

APPLICATION FILED MAB. 17,1911.

Patented Apr. 22, 1913.

WK M v NVENTQR EDWARD H. MARTIN, OF WEBSTER CITY, IOWA rnnnrnonnmnrnnme SYSTEM.

Specification of Letters Patent.

Patented Apr. 22,1913.

Application filed March 17, 1911. Serial No. 615,104.

To all whom it may concern:

Be it known that I, EDWARD H. a citizen of the United Webster City, and State of MARTIN, States, residing at in the county of Hamilton Iowa, have invented certain,-

new and useful Improvements in Telephone Metering Systems, a specification.

The present invention relates to' telephone metering, devices and has for its ,ob ect to of which the following is provide a telephone receiver having both" metering mechanism and associated control means carried by the receiver shell. and referably mounted for themost part within it,

only those parts protruding beyond the shell which are to be manipulated in the ordinary useof'the' receiver.

In carrying out my invention, I arrange the mechanism and the, electrical connections so that the meter will operate'at all times that an operative listening circuit extends through the electromagnet windings bf the receiver; In this way, an accurate record is ke t. a

The specific character of the invention will be best understood upon reference to the fol lowing detailed description taken in connection with the accompanying drawings, and its scope'will be particularly-pointed out in the appended claims.

In said drawings, Figure 1 is a vertical section of a receiver constructed in accordance with the present invention, parts being shown in elevation; Fig. 2 is a sectional View illustrating'the main driving spring of the meter mechanism in conjunction with associated contacts which serve to control the listening circuit through the receiver magnet electrical receiver circuit of Fig.1 in association with the transmitter and other elewindings; and Fig 3.1s a diagram of the ments of the usual substation telephone cir-- cuit. Throughout these views, like characters refer to like parts;

Referring to the drawing. in detail, 10 designates a portion of the shell, which is of theusual shape and construction, andll designates the remainder of the shell, which is screwed onto the end of the portion 10.

The latter is provided with threads fort-he reception of the cap 12, and with abridge 13.

A diaphragm 14 is-peripherally ,heldbetween the cap 12 and trated, and, at a point opposite'the opening 15 in the cap, issubjected to the action of the receiver magnet 16, which comprises the the shell 11, as illusvhere illustrated is opposite'end of the receiver, the usual eye into the portion 10 of other and fromsaid arm. This ,much higher rate of windings 17 upon the U-shaped core 18, which passes through suitable openings in the bridge 13. This magnet structure may be'variously constructed in order to meet'the so requirements of the service. The structure merely typical. At the 19 and terminals 20, 21, are provided. The latter are connected in series with the'windings '17, 1:7, by'the wires 22 and 23, the latter including spring contacts 24:, 25; The magnet windings are adapted to be short-circuit'ed by' connecting with the wires 22 and 23, respectively, by wires 28 and 29. The spring'contacts 24 and25 are rigidly-secured at one end to an arm 30 andmaintained insulated from each other and said arm.

The arm is secured to the bottom of a cup 31, which fits the receiver shell and is held'therein by screws 32, or other suit-able means. The spring contacts 26 and 27 are also rigidly secured at one end to an arm 33' and are maintained insulated from each arm 33 is also secured to the under side of the cup 31. The'spring" contacts 26 and27 are normally in engagement, but are adapted to be separated, to break the short-circuit about the magnet 16', by a lever 34, pivoted-at 35 to the arm 33 and having an insulating projec tion 36 which engages the outer end of the spring contact 27, which is a little longer than spring contact 26. The lever 34 is provided with a button 37, which is screwed into it at a point adjacent to the projection 36 and extends throu h an- 0 mm; 38- inthe adjacent portion 0 the sheil into a-position to be engaged by the hand. of the sub scriber when he removes the receiver from its hook to engage in conversation.

The meter mechanism of the device islocated in the bottom of the cup 31' and consists of a clock train having parallel shafts 100.

39, 40, 41, and 42, carrying, respectively, intermeshing gears and pinions43,-44, 45, 46, .47 and 48.- These' shafts are suitably journaled,'.at one end, in the bottom of the cup 31, -and,at the 0th drive the last of the series ofshafts at a speed than the first. The first shaft, 39, is providedwith a spring case 50, which contains a spiral spring 51, 110

secured, at one end, to the case and, at the other end, to the shaft 39.- The spring case;

other spring contacts 26 and 27,-

er, in the bridging "member 49, and the gear train is such as to is firmly secured to'the bottom of the cup.

The shaft 3,9 is wound froma Winding head 52, mounted upon a stem 53, journaled in a frame 54, mounted upon the bridge member 49. The head 52 is secured to the stem 53 by a screw 55 after the cup and the other parts have been inserted into the shell of thereceiver. Beveled gears 56 transmit motion from stem 53 to shaft 39 and the winding head extends beyond the exterior of lthe receiver shell so that it may beengaged by the finger and thumb to wind up thesprin'g 51. In order to hold the spring against return while it is being wound, shaft '39is provided with a ratchet 57 rigidly se cured to it andadapted to be engaged'by a pawl '58, pivoted to one side of the inchi cator wheel 59 of the meter mechanism, the

latterfbeing directly connected to, and mova le: with, the gear vwheel 43. .When the spring 5 1is once wound, it tends to unwind its'elf and the shaft 39 carrying the wheels- 43 and 59 around with the shaft. Therno'vement of the latter, however, is normally prevented by the end 60 of the lever 3t en'ga'g'ing a friction wheel 61, mounted upon ,the last shaft, l2,; of'the gear train.

, Whe n'the' button 37 I is depressed, the end 60 i moves from engagement with the wheel 61 andfjf ree's :the clock train. The wheels 43 and 59 (the latterthe indicatingwheel) are then free to rotate under the ,unwinding jactionof the spring 51.. Such-movemenhhow- .ever, is regulated in speedibythe fan governor r62fcarried by the shaft 42. As soon as the button 37 is released, the end 60 will engagethe wheel'61 andthe further movement of ,theindicating wheel of the meter mechanism will be stopped. Whenever the spring {51 runsfdown, and consequently whenever themechanismgets in such,con- A dition that the indicating wheel will; not regsv isterfthe wire 23 is interrupted at spring contacts 24 and 25 I by a pin 63 which coopcontact. 25. This pin extends through'an openingin theispr ng e e and is sl da le-back and forth thereini .When-the spring 51 iswound up, thespring contact,

50 25, pressing againstthe insulated end of the pin 63, forces it into the case 50 and spring contacts 24 and 25- come into. eng-agement.

spring contacts 24 and25. 1

In 'thediagram of Fig; 3, the 51 rts, heretofore described, are 7 illustrate diagram matically in a substation telephone-circuit, the terminals 20and 21- of thereceiver being 96 connected tothe-lineglimbs 64 and 65,-.re-

minal 21 contact 67" and, 's'witcli ho kyi .The short-circuit through closed contacts2 is interrupted and n0 .c n e sa ien can be 71 in the adja'cent :portionofltheishellul The units of measurement will, of c urse,-de spend uponthe speed-ofrotationof thewheel; "59 which may be variouslyzfmounted :in the: gear train, as will be apparentpf Itt-willaalsd crates between the spring 52 and thespring invention. I ,-j therefore; do lmoti'wl'shit'o be limited to the exact matterrgillustratedtsbuti aim tolcover all' such'talterationsiandiimodifi cations by the terms of the appendedeiclairn by Letters Patent 2ofthe'United states uis' 115A telephone receiver comprising a sh l", *a diaphragm carried l by? said shell; an actl atin'g magnet for said: diaphragm mountfed v tionswithin'fi said shell ffor e'sta listening circuitj ibetween' said'f'te spectively, the former -'throiigh "itransrriitter 66, and the latter through-contact 67 and switch-hook 68. A second path from limb 64 to limb isprovided through condenser 69 and call bell 70. The latter path is open 70 to ringing current, but not to talking current. Whenever the receiver is removed fromthe' hook 6S and the spring. 5110f the meter. mechanism is wound up, a

path extends from limb 64: to limb 65,

through transmitter 66, terminal, 20,

22, "wire 28, closed ontacts 26, 27, 1, 29, wire 23., Closed contacts 24, Q25,

68. This path. does not provide I an operative circuit forithefreceiver; m net c;

and 27 prevents" the operationof the magne Q1 16. It is necessary, therefore,,for theparty holdin'gthe receiver, infv order tojobvtainfa, listening. circuit, to depress buttonl37 andj thereby separate contacts 26 "and 2'1 ftolf open the short-circuit and ganow umnt tl pass through ,the 'winding'sl of gnagnet 16,; As soon, however, as this done, the meter,

ter against the 'subsc'riber The;[op erat1on,, of the meter mechanism and thelexistence of the listening circuit are, therefore, oo-ex; tensive. As 5 before explained, when the, spring of the metermechanism -rfuns dQwn, the circuitis opened at contacts' -24t,25,"and;,; c n qu y. lthe v g b twe n th li bs-1: 6i and 65, viathe transmitter and receiver,,;{

pp th many other 'iilterationsi and -modifications may, be';made- 1in the details-L of the mechanism ;-herei-n: disclosed withoiita departing fromthe spirit and'vscope Tof zthe zn- 1 What I claim as new a'nd desirel-td seem mechanism is released and beginsfto- -registhrough said magnet, meter mechanism carried by said shell, and means operative independently of the electrical potential of said connections and of the position of said receiver for insuringthe operation. of-said meter mechanism coextensively with the existence of said listening circuit.

2. A telephone receiver'comprising a'shell, a diaphragm carried by saidvshell, an actuating magnet for said diaphragm mounted in said shell adjacent to said diaphragm, circuit connections within said shell for said ma net, meter mechanism mounted Within sai shell, and a manually operated member mounted upon said shell for controlling said 'mechanismand varying said circuit conned tions.- f

3, A telephone receiver comprising a shell, a-diaphragm carried by said shell, an actu ating magnet for said diaphragm mounted in said shell adjacent to said diaphragm, circuit connections within said shell tor said magnet, spring actuated meter mechanism mounted within said shell, and a manually operated member mounted upon said shell for controlling said mechanism and varying saidcircuit connections.

4. -A telephone receiver comprising a shell, I -.a diaphragm carried by said shell, an actu- 30 ating magnet for said diaphragm mounted in said shell adjacent to said diaphragm, circuit connections within said shell for establishing a listening circuit through said magnet, spring actuated meter mechanism mounted within said shell, means for free- .ing said mechanism during the existence of.

said listening lcircuit, a winding stem for said mechanism extending through an opening in said shell, and means mounted upon said shell for varying said circuit connections whenever said mechanism runs down.- f 5. A telephone receiver comprising a shell; a cup fitting into the interior of said shell; meter mechanism, spring contacts and a control lever mounted upon'said cup a diaphragm and an actuatingmagnet for said diaphragm mounted in said shell adjacent to the open end of said cup ;-terminals; and

' circuit connections between said magnet, sprin contacts,xand terminals.

6. .phone line, aj telephone receiver, electrical connections between said line and receiver,

a switch-hook for controllin said connections, metermechanism, an a manually operated member mounted-upon said receiver for ,mechanicallyl controlling said mechanism and varying said connect-ions.

7.- A telephone system including a telephone line, a telephone receiver, electrical connections between said line: and receiver, a'switch-hook for'controlling said connections, meter mechanism operative independ ently of the electrical conditio'n'of said line, and a manually operated member mounted circuit connectionswithin said shell for said uponsaid receiver for controlling said mechanism and varying said connections.

8. A- telephone receiver comprising a shell, a-diaphi'agm-carried by said shell, an actuatingmagnet for said diaphragm mounted in said shell adjacent to said diaphragm, terminals u on said shell, electrical. connections withi said shell for establishing a listening circuit -.b etween said terminals through said magnet, spring actuated meter mechanism carried by said shell, and means mounted upon said shell for controlling said mechanism and insuring its operation coextensively with the existence of said listening circuit. 1 I

9. A telephone receiver comprising a shell, a diaphragm carried by said shell, an actuating magnetfor said diaphragm mounted in'said shell adjacent to said diaphragm,

magnet, spring actuated meter mechanism carried by said shell, and a manually operated member mounted upon said shell for controlling said mechanism and varying said circuit connections.

10. A telephone system including a telephone line, a telephone receiver, electrical, connections between said line and receiver, a switch hook for controlling a listening cira cuit for said receiver, meter mechanism, and 7 means upon said receiver operative inde pendently of the position of said receiver for mechanically c gntrolling said mechanism. and insuring its operation coextensively with the existence of said listening circuit;

11. A telephone system including atele-. phone line, a telephone receiver, electrical connections between said line and receiver, a switch hook for controlling a listening circuit for said receiver, meter mechanism 5' operative independently of the electricalcondition of said line and of the position-of saidreoeiver, and means upon said receiver for insuring the. operation .of said mecha-f" nism coextensively with the existence of said listening circuit.

12.,A telephone receiver comprising a shell, a diaphragm carried'by said shell,-an

actuating magnet for said diaphragm mounted in said shell adjacent to said diaphragm, telephone system including a teleterminals upon said shell, electrical connections within said shell for establishing a listening circuit between said terminals through said magnet, meter mechanism car-1 ried by said shell and requiring for itsoperation to bewound, and means for winding said mechanism. and insuring its operation coextensively with the existence of said listening circuit independently of the position ofsaid receiver.

13. A telephone .receiver comprising ashell, a diaphragm carried by said shell, an

actuating magnet for said diaphragm mounted in said shell adjacent to said diaphragm, circuit connectionswithin said shell for said actuating magnet for ated means upon said shell for winding and" controlling saidmechanism and controlling ,said circuit connections.

15. A telephone system including a telephone line, a telephone receiver, electrical connections between said li-neand receiver,

a switch hook for controlllng said connec-v tions, meter mechanism requiring for its'*op eratioii to be Wound, and manually operated means for winding and controlling said mechanism and varying said connections.

, 16. A telephone receiver comprising a shell, a diaphragm carried by said shell, an said diaphragm mounted in said shell adjacent to said diaphragm, terminals upon. said shell, electrical connections Within said shell for-establishing a listening circuit between said ter minals through said magnet, meter Inehanism carried by said shell, means for storing energy for the operation of said mechanism, and means operative independently of the position of said receiver for ,efiecting the operation of said mechanism by said stored energy co-extensively with the existence of said listening circuit.

17. A telephone receiver comprising i a shelL-a diaphragm carried by said shell, an actuating magnet for said diaphragm mounted in said shell adjacent to said diaphragm, circuit connections within'said shell for said magnet, meter mechanism carried by said Copies of this patent may be obtained for i,ois9,745

shell, means for storing'energy' for the operation' of said mechanism, and means upon said shell for controlling the operation of, said mechanism bysaid stored energy and so also controlling said circuit connectionshi.

18. A telephone systemincludingjaitelephone line, a telephone receiveflelectrical 7 connections between said line and rece ver, v, a switch hook for controlling sa d connecx tions, meter mechanism, means for storing energy for the operation of said mechanism,

and means upon said shelifor controlling.

the operation of said mechanism by said stored energy and also controlling, said cir a v f v -1 0 j 19. A telephone system including 'a tele cuit connections.

phone line, a. telephone receiver, [electrical connections between said line and receiver,

a switch-hook'for controlling a-lis'tening cirff f' cuit for said receiver through saidconnec-.

tions, meter mechanism, and means opera-q tive' independently of the electrical condition of said line and'of the position ofsaidzlfef' Ij I; ceiver to insure the operation ofsai' d meter j mechanism coextensively with the existence of said listening circuit.

20. A telephone system including, a tele:

phone line, a telephone.receiver, electrical connections between sa d hue and receiver, a switch-hook forcontrollmga listen ng c r-ucuit fdr said receiver through, said connec tions, meter mechanism, means, for 'Ts'toring f energy for the operation of said mechanism,

and means operative independently ofjthe;

position of said receiver for efiectiiig the operation of said mechanism Jbyflsaid "stored? f energy coextensively; withlthe 'e zi'stenoe' offl said listeningcircuit.

In witness whereof, Ihereiiiito my name this l lthgdayof a, A D \Vitnesses: (I

- WILL L. Gmr'ron.

five cents each, by addressing the Commissioner-bi. Patent-i, Q WashingtOnQD QF a Y 

